Silver pocket watch with initials J.R.

Found a silver pocket watch this afternoon around 2:15pm in the Gaslamp Quarter, Market Street near Fifth Avenue, just outside a vintage shop. It's an open-face watch about 4.5 cm in diameter, with a sunburst pattern on the cover and the initials J.R. engraved inside the back, plus a short tarnished silver chain. The glass has a tiny chip on the edge, but the watch still ticks when you shake it. I know this is probably someone’s cherished heirloom, and I’d love to get it back—if this sounds like yours, share a detail like the engraving or the chain with me.